Exxon Mobil Corp. more than replaced its production of oil and natural gas in 2012, building on nearly two decades of growth in proved reserves, the energy giant said Tuesday.

The world's largest nonstate energy company said it added 1.8 billion oil-equivalent barrels to its proved reserves in 2012, largely from North American oil plays. That exceeded Exxon Mobil's production of about 1.5 billion oil-equivalent barrels last year.

Proved reserves are fossil fuels that the company can recover from its leaseholds using infrastructure that exists, is under construction or would require minimal new investment.

Exxon Mobil's proved reserves at the end of 2012 totaled 25.2 billion barrels of oil equivalent, including 51 percent in liquid hydrocarbons and 49 percent in natural gas. At the end of 2011, Exxon Mobil had 24.9 billion oil-equivalent barrels of proved reserves, including 49 percent liquids and 51 percent gas.

It was the 19th consecutive year that Exxon Mobil more than replaced its production with expanded proved reserves, according to the company.

In the Eagle Ford Shale, the company said it completed a well in McMullen County with 20 hydraulic fracturing stages. The well was completed for about $6.1 million, almost $2 million below estimates. A second well going forward with 19 fracturing stages and fracking on a third will begin in March.

Abraxas owns a 25 percent working interest in the well and an 18.75 percent interest in the second.

In the Williston Basin of North Dakota and Montana, Abraxas expects production to begin soon on two wells in which it owns a 49 percent working interest.

At year's end, Abraxas said its proved oil and natural gas reserves consisted of about 30.1 million barrels of oil equivalent, a net increase of 0.84 million barrels of oil equivalent over 2011's year-end reserves.